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ajs nac 12

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cagivadave
L Plate Warrior



Joined: 27 Jan 2014
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PostPosted: 09:15 - 28 Jan 2014    Post subject: ajs nac 12 Reply with quote
Need help with ajs nac 12.
Engine turns over but doesnt idle. When reving it up it revs but it stays reved up. Spark plugs are black with dry sutty stuff. Plese help me.
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P.addy
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 09:20 - 28 Jan 2014    Post subject: Reply with quote
Running rich or you might have an air leak.

I'd take the carb off, make sure all the jets are screwed in and not vibrated loose, check the inlet rubber for any cracks and change the spark plug.

I suppose another thing you could check is the idle screw and the throttle cable, especially if it stays revving, it might be caught somewhere.
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cagivadave
L Plate Warrior



Joined: 27 Jan 2014
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PostPosted: 09:32 - 28 Jan 2014    Post subject: Reply with quote
Checked throttle cable no sticks and theres no air leaks. Messed around with the pilot screws and still is the same. Its running well rich and i cant seem to tone it down at all .
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anthony_r6
World Chat Champion



Joined: 31 Mar 2011
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PostPosted: 09:37 - 28 Jan 2014    Post subject: Reply with quote
Choke stuck on?
____________________
Ted : "Maybe he's agoraphobic."
Dougal : "Jack scared of fighting? I don't think so, Ted."
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cagivadave
L Plate Warrior



Joined: 27 Jan 2014
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PostPosted: 09:41 - 28 Jan 2014    Post subject: Reply with quote
AnPhonEh wrote:
Choke stuck on?

thought it might be that but its notchoke fully workin up and down
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anthony_r6
World Chat Champion



Joined: 31 Mar 2011
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PostPosted: 09:43 - 28 Jan 2014    Post subject: Reply with quote
is the engine idle changing whilst you toggle with it? Mine moves up and down, but sure as hell isn't working. Laughing I'd make sure it's opening and closing on the carb (if you haven't done already)
____________________
Ted : "Maybe he's agoraphobic."
Dougal : "Jack scared of fighting? I don't think so, Ted."
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P.addy
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 09:46 - 28 Jan 2014    Post subject: Reply with quote
I'd still have the carb off. Just to check everything is clean and working.

You say you've messed with the screws on the carb... have you put them back to standard?
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cagivadave
L Plate Warrior



Joined: 27 Jan 2014
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PostPosted: 09:47 - 28 Jan 2014    Post subject: Reply with quote
AnPhonEh wrote:
is the engine idle changing whilst you toggle with it? Mine moves up and down, but sure as hell isn't working. Laughing I'd make sure it's opening and closing on the carb (if you haven't done already)

revs up well high when pulli g the choke lever even when engine is hot. The fuel and air mix is messed up i think but iv tinkered about with most things and have spent hours looking for the problem but cant find it.
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cagivadave
L Plate Warrior



Joined: 27 Jan 2014
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PostPosted: 09:49 - 28 Jan 2014    Post subject: Reply with quote
Paddy. wrote:
I'd still have the carb off. Just to check everything is clean and working.

You say you've messed with the screws on the carb... have you put them back to standard?


gonna take it off in a bit and strip it out a d blow it al through.
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cagivadave
L Plate Warrior



Joined: 27 Jan 2014
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PostPosted: 10:41 - 28 Jan 2014    Post subject: Reply with quote
Paddy. wrote:
I'd still have the carb off. Just to check everything is clean and working.

You say you've messed with the screws on the carb... have you put them back to standard?


gonna take it off in a bit and strip it out a d blow it al through.
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cagivadave
L Plate Warrior



Joined: 27 Jan 2014
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PostPosted: 13:52 - 28 Jan 2014    Post subject: ajs nac 12 Reply with quote
So after taking the carbs off and strippin them and cleaning nothing was found out of place. Chokehad a bit of dirt in it but jow is clear.
Put it back on cranked the engine.

Still the same. New spark plugs are now as black and sooty as the old ones.

any ideas???????
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